Siemens ET 200S - Page 437

Analog Electronic Modules
12-81
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Analog Value Generation
Measuring principle Instantaneous value
encoding
Cycle time/Resolution:
 Conversion time in ms
(per channel)
0.1
 Cycle time in ms (per
module)
1
 Resolution (including
overrange)
" 10 V/13 bits +
sign
" 5 V/13 bits + sign
"
2.5 V/13 bits +
sign
1 to 5 V/13 bits
Suppression of Interference, Limits of Error
 Common mode
interference (U
cm
)
< 100 V
SS
> 70 dB
Crosstalk between the
inputs
> 50 dB
Operational limit
(entire temperature range
with reference to input
range)
" 3%
Basic error limit (operational
limit at 25 C with reference
to input range)
"0.2%
Temperature error (with re-
ference to the input range)
"0.01%/K
Linearity error (with refe-
rence to the input range)
"0.01%
Repeatability
(in steady state at 25 C
with reference to input
range)
"0.05%
Data for Selecting a Sensor
Input ranges (rated
value)/input resistance
 Voltage "10 V/min. 100 kΩ
"5 V/min. 100 kΩ
"2.5 V/min. 100 kΩ
1 – 5 V/min. 100 kΩ
Maximum input voltage for
voltage input (destruction
limit)
50 V continuous,
100 V for max. 1 ms
(pulse duty factor
1:20)
Connection of the sensors
 For measuring voltage Possible
Smoothing of the measured
values
Yes, parameteriza-
ble in 4 steps by
means of digital filte-
ring
Step
None
Weak
Medium
Strong
Time constant
1 x cycle time
64 x cycle time
256 x cycle time
512 x cycle time
1
DPV1 only
2
Parameter assignment error
Violation of lower limit value
Violation of upper limit value
Open circuit (only with 1 to 5 V)
Hardware interrupt lost